Guess what? U.S. carbon emissions popped back up in a big way

For three straight years, carbon dioxide emissions in the U.S. dropped. But in 2018, emissions of the potent greenhouse gas shot back up.

A new report by the Rhodium Group — a research institution that analyzes global economic and environmental trends — found that in 2018 carbon dioxide emissions rose 3.4 percent from the prior year. That’s the second largest gain in the last two decades.